Bulletin M-4
General Description: Ordering Instructions:
* Machine Type Transformer * Order by model number shown
* Stacked Core * Add "X" to model number if transformer is to be fully potted
* Frame Cross Sections:
for V & VA frames 13 3/8" X 20 3/4"
for U & UA frames 16 1/2" X 20 3/4"
KVA Rating Secondary No. of Tap Switch RWMA Model No. Weight Dwg. Frame Turns Ratio 440 V
110 C Rise Voltage Taps Location Pad Size 440V/60 Hz Approx. No. Letter Tap 1 Tap 2 Tap 3 Tap 4 Tap 5 Tap 6 Tap 7 Tap 8
250 7.6 to 13.8 8 End Mount 3 M446250V1BOL 975 R1286 V 58:1 53:1 49:1 45:1 41:1 38:1 35:1 32:1
  Volts                              
300 8.6 to 15.7 8 End Mount 3 M446300VA1BOL 1085 R1286 VA 51:1 47:1 43:1 39:1 36:1 33:1 30:1 28:1
  Volts                              
300 8.6 to 15.7 8 End Mount 4 M446300VA1BPL 1100 R1286 VA 51:1 47:1 43:1 39:1 36:1 33:1 30:1 28:1
  Volts                              
400 8.8 to 16.9 8 End Mount 4 M446400U1BPL 1465 R1285 U 50:1 46:1 42:1 38:1 34:1 31:1 28:1 26:1
  Volts                              
500 9.8 to 18.3 8 End Mount 4 M446500UA1BPL 1545 R1285 UA 45:1 41:1 37:1 34:1 31:1 28:1 26:1 24:1
  Volts                              
Standard Features: Optional Features:
* Class "F" insulation * Voltages and frequencies other than shown available on request
* Stud connections for primary wiring * Thermostats
* Secondary pad sizes and hole spacings to RWMA * Special secondary pad sizes available on request
standard * Remote tap switch
* Secondary end positively sealed against
contimination